The new round of negotiations comes amid a long history of delaying tactics by the Russian side as the fighting in Ukraine grinds on.

Russia’s economy is under growing strain as its invasion of Ukraine drags on and Western sanctions are undermining President Vladimir Putin’s ability to sustain his war, a leading European economist said after briefing finance ministers on Tuesday.

Mr. Brooke has traveled to about 100 countries reporting for the New York Times, Bloomberg, and Voice of America. He reported from Russia for eight years and from Ukraine for six years, coming home in 2021.